83-28 Additional Securities Voluntarily Added Into National Market System

TO: All NASD Members and NASDAQ Level 2 and Level 3 Subscribers

The National Market System will expand to 329 securities on June 21 when 50 more NASDAQ issues are voluntarily added to the 279 securities already trading on the System.

These 50 securities meet the SEC's criteria for voluntary designation, which include an average monthly trading volume of 100,000 shares and a minimum bid price of $5.

The 50 securities scheduled to join NMS on June 21 are:

AFGN

AFG Industries, Inc.

Kingsport, TN

ANEN

Anaren Microwave, Inc.

E. Syracuse, NY

BOHI

BancOhio Corporation

Columbus, OH

BTEC

BancTec, Inc.

Dallas, TX

BIRD

Bird Incorporated

E. Walpole, MA

CRLNF

Carolin Mines Ltd.

Vancouver, B.C.

CNCR

CenCor, Inc.

Kansas City, MO

CENB

Centran Corporation

Cleveland, OH

CNVL

Cenvill Development Corp.

W. Palm Beach, FL

CFSC

CFS Continental, Inc.

Chicago, IL

CTCQ

Check Technology Corporation

Eden Prairie, MN

CHEK

Checkpoint Systems, Inc.

Thorofare, NJ

COHR

Coherent, Inc.

Palo Alto, CA

CCSTS

Consolidated Capital Special Trust

Emeryville, CA

CORD

Cordis Corporation

Miami, FL

DASW

Data Switch Corporation

Norwalk, CT

DWSN

Dawson Geophysical Company

Midland, TX

DCOM

DICOMED Corporation

Minneapolis, MN

DRXR

Drexler Technology Corporation

Mountain View, CA

EMOD

Electronic Modules Corporation

Hunt Valley, MD

ENZO

Enzo Biochem, Inc.

New York, NY

GMEX

Garcia's of Scottsdale, Inc.

Phoenix, AZ

GTRE

GranTree Corporation

Portland, OR

GNUC

Gulf Nuclear Incorporated

Webster, TX

ICOT

ICOT Corporation

Mountain View, CA

INUC

Immuno Nuclear Corporation

Stillwater, MN

INTS

Intelligent Systems Corp.

Norcross, GA

IKNG

International King's Table, Inc.

Eugene, OR

JIFY

Jiffy Industries, Inc.

Pompano Beach, FL

KENCA

Kentucky Central Life Insurance Company

Lexington, KY

MCQA

McQuay Inc.

Minneapolis, MN

MNTR

Mentor Corporation

Minneapolis, MN

NIELA

A.C. Nielsen Company (Class A)

Northbrook, IL

NIELB

A.C. Nielsen Company (Class B)

Northbrook, IL

NATL

North Atlantic Industries, Inc.

Hauppauge, NY

NMRX

Numerax, Inc.

Maywood, NJ

OLOG

Offshore Logistics, Inc.

Lafayette, LA

OSHM

Oshman's Sporting Goods, Inc.

Houston, TX

PPSI

Paco Pharmaceutical Services, Inc.

Lakewood, NJ

PROP

Production Operators Corp

Houston, TX

RADS

Radiation Systems, Inc.

Sterling, VA

RRCO

Royal Resources Corporation

Denver, CO

QPON

Seven Oaks International, Inc.

Memphis, TN

STRY

Stryker Corporation

Kalamazoo, MI

SSKY

Super Sky International, Inc.

Mequon, WI

TCII

Technology for Communications International

Mountain View, CA

TLAB

Tellabs, Inc.

Lisle, IL

TFCI

Times Fiber Communications, Inc.

Wallingford, CT

TUCK

Tucker Drilling Company, Inc.

San Angelo, TX

VOLT

Volt Information Sciences, Inc.

New York, NY

Any questions regarding this notice should be directed to Donald H. Bosic, Assistant Director, NASDAQ Operations, at (202) 728-8043. Questions pertaining to the trade reporting rules should be directed to Leon Bastien (202) 728-8202.